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Merck
CN

20989

Cesium fluoride

BioUltra, ≥99.0% (F)

Synonym(s):

NSC 84270

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About This Item

Empirical Formula (Hill Notation):
CsF
CAS Number:
Molecular Weight:
151.90
NACRES:
NA.25
PubChem Substance ID:
UNSPSC Code:
12352302
EC Number:
236-487-3
MDL number:
Assay:
≥99.0% (F)
Grade:
reagent grade
Solubility:
H2O: 3 M at 20 °C, clear, colorless
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grade

reagent grade

Quality Level

product line

BioUltra

assay

≥99.0% (F)

impurities

insoluble matter, passes filter test, ≤0.005% total nitrogen (N)

loss

≤0.5% loss on drying, 110 °C

pH

6.5-7.5 (25 °C, 3 M in H2O)

mp

682 °C (lit.)

solubility

H2O: 3 M at 20 °C, clear, colorless

density

4.115 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤500 mg/kg, sulfate (SO42-): ≤50 mg/kg

cation traces

Al: ≤10 mg/kg, As: ≤0.5 mg/kg, Ba: ≤10 mg/kg, Bi: ≤5 mg/kg, Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤30 mg/kg, K: ≤100 mg/kg, Li: ≤5 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, Mo: ≤5 mg/kg, Na: ≤50 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Sr: ≤5 mg/kg, Zn: ≤5 mg/kg

λ

3 M in H2O

UV absorption

λ: 260 nm Amax: 0.05, λ: 280 nm Amax: 0.05

SMILES string

[F-].[Cs+]

InChI

1S/Cs.FH/h;1H/q+1;/p-1

InChI key

XJHCXCQVJFPJIK-UHFFFAOYSA-M

Application

Reactant for:
  • Preparation of building blocks for synthesis of fluoroallylic compounds
  • Synthesis of alcohols via hydrolysis of alkyl silyl ethers at neutral pH in buffered mixed organic-aqueous solutions
  • Nucleophilic fluorination of alkynyliodonium salts to form fluorovinylic compounds
  • Nucleophilic aromatic substitution (SNAr) reactions
Used in the successful synthesis of a single-crystal Dion-Jacobson phase, CsLaTa2O7, that has applications in photocatalysis and superconductivity.


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Danger

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Chronic 3 - Eye Dam. 1 - Repr. 2 - STOT RE 2

target_organs

Kidney,Adrenal gland

supp_hazards

Storage Class

11 - Combustible Solids

wgk

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

Regulatory Information

危险化学品

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J Fernandez-Bertrán et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 57(13), 2607-2615 (2002-01-05)
The interactions of alkali fluorides with D-xylose have been studied by X-ray diffraction (XRD), infrared spectroscopy (IR), nuclear magnetic resonance (NMR, 1H and 13C) and atomic absorption spectrophotometry. KF and CsF form complexes with D-xylose in a 1:1 molar ratio.
Nongmaithem Jiten Singh et al.
The journal of physical chemistry. B, 110(8), 3808-3815 (2006-02-24)
The structures, stabilities, thermodynamic quantities, dissociation energies, infrared spectra, and electronic properties of CsF hydrated by water molecules are investigated by using density functional theory, Møller-Plesset second-order perturbation theory (MP2), coupled cluster theory with singles, doubles, and perturbative triples excitations
Takashi Okitsu et al.
Chemical communications (Cambridge, England), (47)(47), 6330-6332 (2008-12-03)
A highly efficient and rapid total synthesis of 9Z-retinoic acid was accomplished by caesium fluoride-promoted Stille coupling reaction; using a common building block, 9Z-retinoic acid analogues were also prepared by the same method without isomerisation of the Z-double bond.



Global Trade Item Number

SKUGTIN
20989-250G04061833440094
20989-10G04061838770967